TLE4935 or SS495 bipolar HALL sensor (no mounting screw, epoxy needed!)
Since multiple magnets (some with north, some with south) needed for this, it's much more work to get this working (except when some machinery already has the different polarity magnets). The unipolar is more suitable for position sensing, almost always.
You most likely need the unipolar sensor, see the unipolar HALL sensor SS443 or TLE4905L where only 1 magnet per pulse is needed.